"Old ghost!" joke

Santa and Banta left the bar after a long night of drinking, jumped in the car and started it up. After a couple of minutes, an old man appeared in the passenger window and tapped lightly. Banta screamed, "Look at the window. There's an old ghost's face here!"
Santa sped up, but the old man's face stayed in the window. Banta rolled his window down part way and, scared out of his wits, said, "What do you want?"
The old man softly replied, "You got any tobacco?"
Banta handed the old man a cigarette and yelled, "Step on it," to Santa, rolling up the window in terror.
A few minutes later they calmed down and started laughing again.
Santa said, "I don't know what happened, but don't worry; the speedometer says we're doing 80 now."
All of a sudden there was a light tapping on the window and the old man reappeared.
"There he is again," Banta yelled. He rolled down the window and shakily said, "Yes?"
"Do you have a light?" the old man quietly asked.
Banta threw a lighter out the window saying, "Step on it!"
They were driving about 100 miles an hour, trying to forget what they had just seen and heard, when all of a sudden there came some more tapping.
"Oh my God! He's back!"
Banta rolled down the window and screamed in stark terror, "WHAT NOW?"
The old man gently replied, "You want some help getting out of the mud?"